How can I get an equation that fits this

Step-by-step explanation:

non real roots come in pairs. so an example of a non real root would be y=ax + bi and y = ax - bi.

the fact that it is rational with a multiplicity of 2 means that their is a root that is raised to the power of 2. So we now have y = (x +a)^2 or something like it.

The leading coefficient is even. That means y = 2c * (x + 2)^2 (ax + bi)(ax - bi)

The fact that the two variables (x and y) both go to minus  infinity means that c<0. c is minus).  

  21.3

step-by-step explanation:

multiplying the given equation by c/sin(25°), we get

  c = 9/sin(25°) ≈ 21.2958 ≈ 21.3

we assume "c" is the length of ab, the side opposite angle c in triangle abc.

5x+40

5(x + 8)

7x - 49

7(x - 7)

18x + 9

9(2x + 1)

15x - 10

5(3x - 2)

step-by-step explanation:

for number one all you have to do is factor 5 out of 5x + 40

for number 2 factor 7 out of 7x - 49

for number three factor 9 out of 18x + 9

for number four factor 5 out of 15x - 10